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ratelena [41]
3 years ago
6

A person who has a weakened immune system may not be able to fight against infection because

Biology
2 answers:
ra1l [238]3 years ago
8 0

Answer:

a.

Explanation:

pathogens may enter the body and cause illness.

Sholpan [36]3 years ago
7 0

Answer:

A is the answer to you question ED2020

Explanation:

this would be your answer guys !!

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Trace the flow of energy through a typical food chain (describing "what eats what"), including the original source of that energ
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Answer:

The answer is given below:

Explanation:

A food chain consists of producers and different consumers. Producers are the organisms which produces food using sun energy. Consumes directly eats plants or eat other animals to fulfill their energy needs. So, in any ecosystem energy flows through food chain in unidirectionl manner.

Sun is the ultimate source of energy. The producers uses solar energy to make chemical energy (glucose) through photosyntheis. The cosumers use this chemical enegy through food by eating plants. Some animals eat other animals to get energy. The chemical energy stored as ATP (an energy currency).  

5 0
3 years ago
A(n) ____________________ is a type of matter that has a unique set of properties and that cannot be broken down into simpler su
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Answer:

A(n) <u>element</u> is a type of matter that has a unique set of properties and that cannot be broken down into simpler substances by chemical means.

Explanation:

A element is the simplest form of matter which also has a unique set of properties.

Hope this helps!!

5 0
3 years ago
How are the nervous system of a flatworm and a fish different? My
Misha Larkins [42]
Fishes and worms are diffrent so in other words there systems such as  reproduction system are not the same because they will not be able to mate 
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3 years ago
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What hormone reduces blood pressure and blood volume by inhibiting nearly all events that promote vasoconstriction and sodium io
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I looked it up and it said it was Aldosterone
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What is the exchange of segments of dna between the members of the pair of cromezones
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CROSSING OVER is the exchange of segemetics of dna or genetic matierial between the members of the pairs of cromezones

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